Sunni fighters eye Baghdad as Kerry calls for unity
24 June 2014 Last updated at 23:20 BST
Baghdad will fall "in less than one month", according to Sunni insurgents in Iraq.
Speaking exclusively to BBC News, two anonymous fighters said they were determined to reach the capital "very soon".
Meanwhile, the US Secretary of State, John Kerry, has called for unity during a visit to the city of Irbil.
Fergal Keane reports from Irbil.